Foldable boat trailer



FIG. 1 is an isometric view of a foldable boat trailer, in accordance with the present design;

FIG. 2 is a front view of the foldable boat trailer;

FIG. 3 is a rear view of the foldable boat trailer;

FIG. 4 is a right side view of the foldable boat trailer;

FIG. 5 is a left side view of the foldable boat trailer;

FIG. 6 is a top plan view of the foldable boat trailer;

FIG. 7 is a bottom plan view of the foldable boat trailer;

FIG. 8 is a rear view of the foldable boat trailer of FIG. 1, shown in the folded configuration;

FIG. 9 is a bottom plan view of the foldable boat trailer, shown in the folded configuration;

FIG. 10 is a front view of the foldable boat trailer, shown in the folded configuration;

FIG. 11 is a left side view of the foldable boat trailer, shown in the folded configuration;

FIG. 12 is a right side view of the foldable boat trailer, shown in the folded configuration; and,

FIG. 13 is a top plan view of the foldable boat trailer, shown in the folded configuration. 

CLAIM The ornamental design for a foldable boat trailer, as shown and described. 